Can you think of any three-dimensional shape that comprises of exactly two surfaces?

If,

6 / 7 = 2
3 / 9 = 7
8 / 2 = 6

Then

4 / 5 = ?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

If,

Akriti = 631
Levis = 521
Sroti = 521
Aneel = 533
Then,
Sunil =?

You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT

When can we add 2 to 11 and get 1 as the correct answer?

Using eight eights and addition only, can you make 1000?

I never was there, I am always to be.
You have never ever seen me, not ever you will.
Yet I am the confidence of everyone.

Who Am I?

In a school, there are four subjects. Seventy percent of students study English, seventy five percent of students study Science, eighty five percent of students study Mathematics and eighty percent of students study Spanish.

Can you calculate the percentage of students that study all four subjects?